Malicious PDF — malware analysis report

Static analysis result for SHA-256 1076231e2e06847a…

MALICIOUS

PDF

71.3 KB Created: 2021-05-14 17:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 51e757d8cdc031c2f51d58f14f95c2cd SHA-1: 804f8cd850ae3608e173f8d532c3ad4e4115a4a1 SHA-256: 1076231e2e06847a05e59980d28eccb8e4c071b2d39de668164cb062ab0d686f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to song lyrics, suggesting a lure to disguise the malicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/strik?utm_term=the+power+of+love+lyrics+huey+lewis PDF link annotation
    • http://vezawerogodeget.iblogger.org/agnes_martin_lugand_carti.pdfIn PDF document text
    • http://nelomevasusuf.22web.org/thread_dimension_chart.pdfIn PDF document text
    • http://takovod.66ghz.com/wolf_repair_near_me.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/tubozovixovajigobedubaju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/purulavoxupababeni.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_9879bae0c8944ea9b32a0c334e695c62.pdf?index=trueIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_05cfd1ac4ec6465293d665e40cb97286.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazolu/2521632920.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/weekly_planner_printable_tumblr.pdfIn PDF document text
    • http://faxanudof.epizy.com/cambridge_checkpoint_past_papers_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a1bf31-4a82-4ca2-893c-d9303b596509/tugopezitukarakilopabopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd12b33-68d2-4d6f-99cc-87a0a4378276/1619202234.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/what_is_the_use_of_statistics_in_psychology.pdfIn PDF document text
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_9e8e71715ce04f368152987cf02919db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/china_maple_leaf_annual_report_2016.pdfIn PDF document text
    • http://gegawuwiru.epizy.com/7301997089.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/java_7_ubuntu.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/valores_morales_universales.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/52668819658.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/campylobacter_jejuni_caracteristicas.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 5096 bytes
SHA-256: d46ed7d29782b410ecbabd8ead4cca70fe42d00157f3013c40015e92ffecb04b
font_01_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 10592 bytes
SHA-256: 3887a6893e75515e332488abe1bde65ee3de8ea86653963166d8a776e1e930cb

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